PGA970: Boot up and communicate with custom board

Hi all,

We are building a custom board for PGA970, may I know how to:

1. Set up SPI communication

2. Download the program

3. Boot up the program after downloading

4. Communicate with the board through SPI

Actually, I found a very useful post about this:

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/778690/pga970-how-to-use-pga970-on-custom-board-what-is-the-default-spi-etc

However, I cannot find the important information mentioned in the answer on my datasheet downloaded from TI website. I wonder if I miss any documents. Could you please provide the link to the relevant document.

Thanks a lot.